I see your point. I have a solution for you, but you won't like it. Do not tag for the renderer. OK, you won't get in the way of a renderer if you make a map available for download onto GPSRs. But that's what you are going to do.
The solution is a bit complicated. Maybe you will find some help by computerteddy. He makes an extract of OSM's data for Europe and creates map tiles on a regular basis. The process is like this: - download the OSM Database - cut into pieces - extract to a shapefile format applying a conversion scheme in this step - generate .img files - create a style file for the GPSR - put everything on a website for download The shapefile export and conversion scheme makes what you aim at. There, the definition is applied which object categories show up in which zoomlevel. I did not fully understand the process, as I was not searching for a complicated solution. But you could define to show service roads in lesser zoomlevels there and create your own set of .img files. The result will be a theme map for Canadian circumstances. Tag the roads as highway=service, as this is the best fit for your description. Good luck! -------- Original-Nachricht -------- > Datum: Tue, 24 Nov 2009 10:50:07 -0700 > Von: James Ewen <[email protected]> > An: [email protected] > Betreff: Re: [OSM-newbies] tertiary dirt roads? > On Tue, Nov 24, 2009 at 8:14 AM, Thomas Meller <[email protected]> > wrote: > > > If the way is usable as an interconnect for main traffic, I would not > tag > > it as 'unclassified', at least if it connects towns and alike, and not > > (one or more) single houses. If it makes access to a wide landscape > > possible, I would tag it as tertiary, maybe as unclassified if it's very > narrow. > > That's where we have a fundamental difference between Europe and > Canada. I can show you hundreds of thousands of square kilometres of > countryside with zero houses let alone towns or villages. The main > reason for access into these areas is for access to natural resources, > such as forestry cutblocks, natural gas wells, oil wells, and mineral > mines. Also as a byproduct of all the traffic in the bush, you'll find > roads accessing hilltops where radio towers and forestry look out > towers are located. > > My GPS navigator is designed for the regular motorist, who rarely > leaves the paved roads. It becomes less than useful when out in the > bush because most of these roads are not in the database. The OSM > database, however has just about all of these roads, but the tagging > scheme based on European standards would have us tag them all as > little dirt paths in the bush, when in fact some of the main haul > roads are much larger and better maintained than some of the > government secondary highways. > > My opinion is that we tag these major haul roads just below the > secondary highway status, so that they show up on a map with an > importance similar to the level that tertiary roads appear. This would > mean that a user would be able to see that the road exist, and might > make the choice to make the shortcut through the bush on a forestry > road rather than add a couple hundred km of distance by using the > government road network. Obviously things like surface type and > condition would have a bearing, as some people might not appreciate > taking their fancy sports car down a rough gravelled road where huge > logging trucks might throw rocks up into their windshields. If the > information however is obscured do to tagging information not showing > the importance of the road, the user can't make that decision. > > James > VE6SRV > > _______________________________________________ > newbies mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/newbies -- http://www.openstreetmap.org/?lat=47.172&lon=7.4395&zoom=14&layers=0B00FTFTT&mlat=47.16677&mlon=7.43513 Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3.5 - sicherer, schneller und einfacher! http://portal.gmx.net/de/go/chbrowser _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
